[mb] align build config for builders using swarming dev

Before renaming swarming builders for crbug.com/955013, let me fix build
config so that each builder uses the same build config with typical
builders.

Bug: 943176
Change-Id: Ie203ee1ccd05491fe8332e1206d75ad6235b022c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2026556
Auto-Submit: Takuto Ikuta <tikuta@chromium.org>
Reviewed-by: Yoshisato Yanagisawa <yyanagisawa@google.com>
Commit-Queue: Takuto Ikuta <tikuta@chromium.org>
Cr-Commit-Position: refs/heads/master@{#736256}

tools/mb/mb_config.pyl

@@ -536,14 +536,20 @@
     },
 
     'chromium.swarm': {
-      'Android N5 Swarm': 'android_release_bot_minimal_symbols',
-      'Android N5X Swarm': 'android_release_bot_minimal_symbols_arm64',
-      'Linux Swarm': 'release_bot_minimal_symbols',
+      # This should be the same with 'android-kitkat-arm-rel'.
+      'Android N5 Swarm': 'android_release_bot_minimal_symbols_fastbuild',
 
-      # Use the same config with 'Mac Builder' to pass test for stack trace.
+      # This should be the same with 'android-marshmallow-arm64-rel'.
+      'Android N5X Swarm':  'gpu_tests_android_release_bot_minimal_symbols_arm64_fastbuild',
+
+      # This should be the same with 'Linux Builder'.
+      'Linux Swarm': 'gpu_tests_release_bot',
+
+      # This should be the same with 'Mac Builder'.
       'Mac Swarm': 'gpu_tests_release_bot_minimal_symbols',
 
-      'Windows Swarm': 'release_bot_minimal_symbols',
+      # This should be the same with 'Win x64 Builder'.
+      'Windows Swarm': 'gpu_tests_release_bot_minimal_symbols',
     },
 
     'client.nacl.sdk': {